Permutation-lock



L. G. SABBAG.

PERMUTATION LOCK.

APPUCATION FILED MAY 9. 1918.

1,356,314. Patented Oct. 19,1920.-

LITFALLAH G. SAIBBAGgOF EAST BOSTON, MASSACHUSETTS.

PERMUTATION-LOCK. i

Specification of Letterslatent.

Patented Oct. 19,1920.

ApplicationfiledgMay 9, 1918. Seria1i1fo."238,595.

To all whom timely concerns I Be it known that I, LITE-ALLAH a citizen of the United States of America, and resident of East Boston, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Permutation-Locks, of which the following is a specification.

This invention relates to keyless or permutation locks, principal objects being to provide a lock of this class of durable, strong and simple construction, efficient to prevent unauthorized opening and adapted to be used instead of padlocks employed to prevent unauthorized removal of or of parts from automobiles, boats, bicycles, and other exposed movable property.

In the accompanying drawings,

Figure 1 is a longitudinal section of the lock showing parts in elevation;

Fig. 2 is an elevation from the left of Fig. 1;

Fig. 3 is a view in plan;

Fig. 4 is a perspective view of one of the permutation tumblers removed.

The lock comprises a frame 1 preferably as shown consisting of an open U-shaped piece bent from a rectangular bar of steel, brass, or other metal, having therein at 2, 3, alined bores adapted to receive the straight round bolt 4 which may be curved at 5 to constitute a shackle projecting at one side of the part 1 and adapted to be turned out of the plane of Fig. 1 to open the same when the bolt is in the open position illustrated in Fig. 1. The shackle 5 terminates at 6 in a portion parallel with the bolt 4 and adapted to enter a bore 7 when the lock is closed.

The bolt 4 is provided with a key or pin 8 adapted just to clear the frame 1 when the lock is fully open and to enter a key seat 9 in the frame 1 when the lock is closed. The bolt 4 is also provided with a stop pin 10 adapted to prevent farther movement of the bolt 4 through the frame 1 more than enough to clear the key 8 beyond the frame- A plurality of locking tumblers 12 are strung on the bolt 4 and adapted to cooperate with lugs 14 integral with or fast in thebolt 4 at uniform distances apart equal to the thickness of the locking tumblers 12. The tumblers 12 may be and preferably are hexagonal bodies, conveniently being formed from such punchings as are used to make hexagonal nuts but of course may be round, or polygons other than hexagons. G. SABBAG,

The centralbore 15 of the tumblers 12 fits on and is rotatable on the bolt 4. The right hand face of each tumbler 12 is circularly recessed at 16 to provide a free space for the rotation of the lugs 14. Each tumbler 12 is provided in a random relation to the faces of its polygonal outer surface with a key-way 17 adapted to receive the lugs 14, when all of the key-ways 17 are in alinement. A preferred arrangement of the keys 17 relative to the surfaces of the hexs agonal or other polygonal periphery of the parts 12 places some of them in line with the meeting faces of the outer surfaces and some of them in line with the middle of one face of each locking tumbler.

Each face of each tumbler bears a number, letter or sign.

The frame 1 may have a counter-sunk hole 20 for a wood screw for attachment to a door as shown in dotted lines at 21, the bolt 4 then taking into a hole 22 in the door frame or jamb.

The operation of the device will now be apparent. A particular order as read by arrangement in line with the upper fiat surfaces of theframe 1 of the tumblers 12 which may readily be turned by hand, is necessary to bring the key way 17 into line with the lugs 14. If any tumbler is out of the position determined by this order the bolt 4 can not be moved longitudinally through the series of tumblers which pref erably are held against each other with some friction by the spring of the slightly resilient bent metal frame 1. In the arrangement shown the tumblers 12 being hexagonal and numbered from 1 to 6, each of them has twelve possible positions of which one only is that for the open position of the look. For instance, as shown in the figure the combination is 3{-5--3.

When the lock has been opened the revolution of the bolt 4 carries the tumblers with it in the order of their combination so that the lock may be closed again withouthaving to reset the combination.

What I claim is:

1. A permutation lock having therein a series of rotatable locking tumblers, a bolt arranged at the center of rotation of said tumblers, means fixed on the bolt adapted to pass each tumbler at one rotative position only of said tumbler, a resilient frame adapted to hold in endwise frictional con-.

tumbler except when the tumbler is in a certain rotative position, to prevent longitudinal movement .of the :bolt except when each of the tumblers is rotated to a definite position, and means for locking the tumblers to the bolt to rotate therewith When longitudinal movement of the bolt is vpermitted,

Signed by me at 'Boston, Massachusetts, this seventh day of May, 1918.

LITFALLAH Gr. SABBAG. 

